Truck wheel brake



April 2.8, 1936. E. LATsHAw TRUCK WHEEL BRAKE Filed Dec. 1l, 1955 3 Sheets-Sheet 1 W. mZ/JM ma R WL m e@ am April 28, 1936. E. LATsHAw TRUCK WHEEL BRAKE Filed Dec. ll, 1935 3 SheeS--Sheety 2 INVENTOR Ei-772er Laisaw ATTO R N EY April Z8, 1936. E, LATSHAW 2,039,274

TRUCK WHEEL BRAKE v Filed Dec. l1. 1955 3 Sheets-Sheet 5 =`i -411 i Q L i l\\ \\\\\\R\\\\\\\\ t 20 I N G Y I /0 R /6 l l 2 4.@ 2v l O 'L/J' j f INVENTOR Zwar LaZsaz// v n v ATTORN EY Patented A pr. 2s, 193s PATENT or-FICE 'raUcx wnrzlurrmlnrn Elmer man", .Philadelphia Ps., minar tu The J.. G., Brill Company, Philadelphia, Ila., a corporation ot Pennsylvania Application December l1, 19315,V Serial No. 53,888

` y1o clam. (Civics-ss) This invention relates generally to improvements in brakes for trucks but in particular to i .trucks oi. the pedestalless type.

Y --Inpedestalless trucks it is obvious that the means which fie the mes to the trucks must sbsorb the various strains normally absorbed by the truck pedestals and it is an object oi this inven-v tion therefore to relieve this means of atleast a portion of the strains that might be im Another object oithe invention is the provision oi a brake arrangement such that the pivot connecting the axle to the truck is relieved of brake lever reaction;

l A further object of the invention is the-provision of a.. brake system for pedestalless trucks wherein the terminal reactions of the system are absorbed by the truck, while all intermediate reactions are absorbed by the truck axle.

p0 A still further object of the invention is the provision of a brake system for pedestalless trucks oi the rubber mounted pivot type .wherein atleast one lever of the system is pivoted .to an axle carried member to relieve the rubber. of brake reac- 25 tion forces.

These and other objects' ot the invention will Y be apparent to one skilled in the art from a study of the following description and accompanying drawings in which:

f a0 Figure l is a sectional view taken adjacent the Fig. 3 is a plan view of the right halt of the truck and Fig. 4 is a sectional view through the axle controlling member andv illustrating details of the pivot. construction.

Referring now in detail to the drawings which disclose a truck somewhat similar to that disclosed in Guernsey Serial No. 704,612 filed December 30, .1933. The truck is shown as ot the two- 5 axle type with a single motor, but it is obvious that if the truck` were of the trailer type both ends oi the truck would-appear as in Fig. 1, while if both axles were driven then both ends o! the truck would appear as in Fig. 2.

50 'I'he truck is'iormed with suitable side frames A tied together by crosstie B and transorns C, all suitably braced and secured' together in a well ,known manner.l Ihe bolster D having vside bearings E carries the car body on the truck through 55 the medium of springs F, and the truck is in turn supported on the axle G by means oi axle control The axle control arms H aremounted tor pivotalmovement with respect to the truck by means of trunnion 2 through which extends bolt 4 car- 5 the Arap 6 which adjustably clamps inner sleeve l of a rubber bushing unit in the desired position. A rubber ring R. is vulcanized to .the inner ring and to theouter ring Il which is suitably clamped to the end oi the control arm by cap 10 l2 through the medium oi'boltsor other means il. The control arm is provided with an enlarged porl tion i6 adapted to receive bearings Il in which .the 'axle is journaled.'l and a suitable portion oi 'the arm is also provided with a spring pocket 20 15 other end resting in a truck carried spring pocket '2L In cases-such 'as Athe present where the truck is' equipped with a motor atleast one ot the control-.arms is modied to provide av gear housing 26 in which the reduction gearing 28 is journaled and, protected.

I'he transoms and crossties are joined together by member 30 which aids in the support or plate 32 carrying the brake cylinders and 36 and this, 25 member likewise supports the motor M which drives the gearing through ilexibley coupling N. The brake cylinders 34 and may be'of different` f sizes for the purpose of obtaining "better braking effects asset forth and claimed in my prior Patent 30 1,896,961 granted February 7, i933.

'Ihe `piston rod 39 acts substantially at the center oisequalizer bar 4U pivotally carried at its ends by inside brake levers 42 which are pivoted fby suitable means 44 to spaced ears 46. These 35 cars are part ci the clamping c ap i2 and, there fore, maybe considered as part of the control arm. The inside brake levers are connected -by means of rods 4I .to the lower end of outside brake lever 60, the upper end oi which is pivoted to-the truck 40 frame as at '5L The outside levers also serve as hangers for brake beams 52 carrying brake shoes 54, and the lshoes are held in proper position by a leveling device. The leveling device consists oi a lever 58 securely fastened at one end ot the 45 system are absorbedby the truck frime at the 5'6" plates l! and pivots Il. It is also evident that the intermediate thrusts are absorbed by the axle through the control arm and wheel from the pivot M and brake shoe respectively and that thus no direct brake thrusts are applied to the rubber bushing.

The rubber bushing need not therefore be made larger than is necessary to absorb the torsional strain due to deection of the spring 22, or the vertical and horizontal thrusts due to the direct load and driving forces.

One form or adaptation .of the invention has been described in detail, but it is to be unders stood that various arrangements and improvements thereof will be evident to one skilled in the art and such arrangements and improvements are contemplated as fall within the scope of the following claims.

What is claimed is:

l. In combination in a truck having wheels and axles in spaced relationship, connected side frames, control arms carried by said-axles, means connecting said arms and side frames together for relative movement, a brake system for said truck comprising in part terminal and intermediate members, said terminal members being carried by the frames and said intermediate members being carried by said control arms.

2. In combination in a truck having wheels and axlesin spaced relationship, connected side frames, control arms carried by said axles, means connecting said arms and side frames together for relative movement, an independent brake system for each axle of said truck comprising, terminal and intermediate members, said terminal members being carried by the frames, and said intermediate members being carried by said control arms.

3. In combination in a truck. having wheels and axles in spaced relationship, connected side frames, control arms carried by said axles, means connecting said arms and side frames together for relative movement, said means comprising in part rubber bushings, a brake system for said truck comprising terminal members, intermediate members and connecting members carried by said nrst and second mentioned mem# bers, said terminal members being carried by the frames, and said intermediate members being carried by said control arms.

4. In combination in a truck having wheels and axles in spaced relationship, connected side frames, control arms carried by said axles, means connecting said arms and side frames together for relative movement, said means comprising in part rubber bushings, a brake system for said truck comprising, terminal members, intermediate members and connecting members carried by said first and second mentioned members, said terminal members being carried by the frames, and said intermediate members being carried by said control arms whereby said bushings are relieved of brake system strains.

5. In combination in a truck having wheels and axles in spaced relationship, connected side frames, control arms carried by said axles, means by the frames and said intermediate members' being carried by said control arms.

6. In combination in a truck having wheelsl and axles in spaced relationship, connected side frames, control arms carried by said axles, means connecting said arms and side frames together for relative movement, said means comprising, resilient bushings, an independent brake system for each axle of said truck comprising, terminal members, intermediate members and connecting members joining said terminal and intermediate members, said terminal members being carried by the frames and said intermediate members being carried by said control arms whereby said bushings are relieved of brake system strains.

7. In combination in a truck having wheels and axles in spaced relationship, connected side frames, means connecting said axles and side frames for relative movement, a brake system for said truck comprising in part, terminal and intermediate members. said terminal members being carried by said frames and said intermediate members being carried by said means.

8. In combination in a truck having wheels and axles in spaced relationship, connected side frames, means connecting said axles and side frames for relative movement, a brake system for said truck comprising in part, terminal and intermediate members, said terminal members being carried by said frames and said intermediate members being carried by said means whereby terminal strains are absorbed by said truck frames and intermediate strains are absorbed by said axle.

9. In combination in a truck having wheels and axles in spaced relationship, connected side frames, means connecting said axles and side frames for relative movement, said means comprising in part rubber bushings, a brake system for said truck comprising in part, terminal and intermediate members, said terminal members being carried by said frames and said intermediate members being carried by said means intermediate said bushings and axle.

10. In combination in a truck having wheels and axles in spaced relationship, connected side frames, means connecting said axles and side frames for relative movement, said means comprising in part rubber bushings, a brake system for said truck comprising in part, terminal and intermediate members, said terminal members being carried by said frames and said intermediate members being carried by said means intermediate said bushings and axles whereby terminal strains are absorbed by said truck frames and intermediate strains are absorbed by said axle independent of said bushings.

ELM'ER LATSHAW. 

